Horsetail Tree
Casuarina equisetifolia (Wikipedia)
Casuarina equisetifolia, commonly known as coastal she-oak, horsetail she-oak, beach sheoak, beach casuarina or whistling tree is a species of flowering plant in the family Casuarinaceae and is native to Australia, New Guinea, Southeast Asia and India. It is a small to medium-sized, monoecious tree with scaly or furrowed bark on older specimens, drooping branchlets, the leaves reduced to scales in whorls of 7 or 8, the fruit 10–24 mm (0.39–0.94 in) long containing winged seeds (samaras) 6–8 mm (0.24–0.31 in) long.
| Casuarina equisetifolia | |
|---|---|
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| Subspecies equisetifolia near Darwin | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fagales |
| Family: | Casuarinaceae |
| Genus: | Casuarina |
| Species: | C. equisetifolia
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| Binomial name | |
| Casuarina equisetifolia | |
| Subspecies | |
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| Synonyms | |
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Casuarina equisetifolia var. typica Domin | |
Subspecies incana near Rockhampton